From 992db13a4aee766c8bfbf046ad15c2db5fa7cab8 Mon Sep 17 00:00:00 2001 From: Xueshi Hu Date: Mon, 14 Aug 2023 21:53:55 +0800 Subject: [PATCH] md/raid1: free the r1bio before waiting for blocked rdev Raid1 reshape will change mempool and r1conf::raid_disks which are needed to free r1bio. allow_barrier() make a concurrent raid1_reshape() possible. So, free the in-flight r1bio before waiting blocked rdev. Fixes: 6bfe0b499082 ("md: support blocking writes to an array on device failure") Reviewed-by: Yu Kuai Signed-off-by: Xueshi Hu Link: https://lore.kernel.org/r/20230814135356.1113639-3-xueshi.hu@smartx.com Signed-off-by: Song Liu --- drivers/md/raid1.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 642c8bae0df0..b3fc44157cfc 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1378,6 +1378,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio, return; } + retry_write: r1_bio = alloc_r1bio(mddev, bio); r1_bio->sectors = max_write_sectors; @@ -1393,7 +1394,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio, */ disks = conf->raid_disks * 2; - retry_write: blocked_rdev = NULL; rcu_read_lock(); max_sectors = r1_bio->sectors; @@ -1473,7 +1473,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio, for (j = 0; j < i; j++) if (r1_bio->bios[j]) rdev_dec_pending(conf->mirrors[j].rdev, mddev); - r1_bio->state = 0; + free_r1bio(r1_bio); allow_barrier(conf, bio->bi_iter.bi_sector); if (bio->bi_opf & REQ_NOWAIT) { -- 2.39.5